BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C055795; Left Rear Wheel Speed Sensor Incorrect Component Installed; 2023 - 2025 MY Corolla Corolla HV [09/2022

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM1000000025DVP
Model Year Start: 2023	Model: Corolla	Prod Date Range: [09/2022 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C055795; Left Rear Wheel Speed Sensor Incorrect Component Installed; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ]

DTC

C055795

Left Rear Wheel Speed Sensor Incorrect Component Installed

DESCRIPTION

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Note
C055795	Left Rear Wheel Speed Sensor Incorrect Component Installed	The rear speed sensor LH is installed incorrectly.	Rear speed sensor LH1 Rear speed sensor LH (rear axle hub and bearing assembly LH)2	Comes on	Brake/EPB	SAE Code: C0557 Output ECU: Skid control ECU (brake actuator assembly)

*1: for AWD
*2: for 2WD

MONITOR DESCRIPTION

The skid control ECU (brake actuator assembly) has a speed sensor circuit self-diagnosis function.

When the vehicle is stopped, the speed sensor supply voltage exceeds a certain value, and the self-diagnosis function detects an incorrectly installed speed sensor, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

MONITOR STRATEGY

Related DTCs	C0557 (Case 1): Wheel speed sensor wrong sensor type monitoring for RL (PWM intelligent sensor) C0557 (Case 2): Wheel speed sensor wrong sensor type monitoring for RL (standard sensor) C0557 (Case 3): Wheel speed sensor wrong sensor type monitoring for RL (intelligent sensor)
Required Sensors/Components(Main)	Skid control ECU (brake actuator assembly)
Required Sensors/Components(Related)	Skid control ECU (brake actuator assembly) Speed sensor
Frequency of Operation	Continuous
Duration	3 seconds
MIL Operation	2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

TMC's intellectual property

CONFIRMATION DRIVING PATTERN

NOTICE:

When performing the normal judgment procedure, make sure that the driver door is closed and is not opened at any time during the procedure.

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off.
Turn the ignition switch to ON (READY) and turn the GTS on.
Wait for 3 seconds or more. [*]
HINT:

[*]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Chassis / Brake/EPB* / Utility / All Readiness.
*: Electric Parking Brake System
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

PROCEDURE

1.	CHECK PART NUMBER (REAR SPEED SENSOR LH)

(a) Check that the rear speed sensor LH is installed.

OK:

Proper rear speed sensor LH is installed.

NOTICE:

If it is necessary to remove components in order to check the rear speed sensor LH, follow the relevant installation and removal procedures and precautions for those components.

HINT:

The rear speed sensor rotor LH and rear speed sensor LH are incorporated into the rear axle hub and bearing assembly LH. (for 2WD)

If the rear speed sensor rotor LH and rear speed sensor LH need to be replaced, replace them together with the rear axle hub and bearing assembly LH. (for 2WD)

REPLACE REAR SPEED SENSOR LH

for 2WD: Click here

for AWD: Click here

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch off.

3.	RECONFIRM DTC

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

(b) Check if the same DTC is output.

Chassis > Brake/EPB > Trouble Codes

HINT:

The rear speed sensor rotor LH and rear speed sensor LH are incorporated into the rear axle hub and bearing assembly LH. (for 2WD)

If the rear speed sensor rotor LH and rear speed sensor LH need to be replaced, replace them together with the rear axle hub and bearing assembly LH. (for 2WD)

Result	Proceed to
DTC C055795 is not output.	A
DTC C055795 is output.	B

USE SIMULATION METHOD TO CHECK

REPLACE REAR SPEED SENSOR LH

for 2WD: Click here

for AWD: Click here